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(No Model.) 2 Sheets-Sneefl.

0. P. UEBBLAGKBR. MAXIMUM TRACTION TRUCK.

' No. 598,403. Patented Feb. 1, 189B.

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TATES ATENT anion.

CHARLES F. UEBELACKER, OF KINGSTON, NEW YORK, ASSIGNOR TO THE PECKI-IAM MOTOR TRUCK AND WHEEL COMPANY, on SAME PLACE.

SPECIFICATION forming part of Letters Patent N 0. 598,493, dated February 1, 1898 Application filed September 10, 1397. Serial No. 651,227. (No model.)

To all whom, it may concern.

Be it known that I, CHARLES F. UEBEL- AOKER, a citizen of the United States, and a resident of Kingston, Ulster county, Stateof New York, have invented certain new and useful Maximum-Traction Trucks, of which the following is a specification.

I The present invention has reference to car trucks more especially intended for electricrailway service.

The object of the invention is to devise a truck of the maximum-traction type which shall be strong and durable and particularly adapted for modern electric-railway service.

The truck, as shown, is provided with a pair of thirty-three-inch driving-wheels and a pair of twenty-inch pilot-wheels, the pilot-wheels being adapted to swing closed cars or the steps of open cars. These dimensions are not to be regarded as invariable, but are those which in practice will be found preferable.

The car-body is adapted to rest on a bolster elastically suspended from the truck-frame and located between the axle of the drivingwheels and the center of the truck and as near as practicable to the driving-axle, the bolster being provided with a king-pin and swivel plates, as usual.

The motor for propellin g the truck is sleeved to the axle of the driving-wheels with its free end elastically supported 011 the end of the truck-frame near the driving-Wheels. The relative positions of the bolster and the motor on the truck insure the necessary traction on the driving-wheels, giving about seventyfive per cent. of the load on such wheels.

To adjust the weight of the car-body on the pilot-Wheels when running through a curve, I provide on the truck-frame outside the pilot-wheels a suitably-shaped track, while to the car-body in the center of its longitudinal axis there is fixed a roller resting on such track and a compressible spring between the roller and car-body. In the present construction the distance between the swivel-point of the truck and the, roller on-the car-body beyond the axle of -the pilot-wheels is at all times substantially constant. In an application for patent filed on even date with the present application, Serial No. 651,228, and to which under the sills of' cross-reference is hereby made, I show a construction whereby the distance between the swivel-point of the truck and the bearing of a roller or slide on the track varies to shift the leverage to a point where it is most desired.

It is to be understood,of course,that in practice the car-body is mounted on a pair of the trucks properly equipped with brake mech- 6o anism adapted to apply the brake-shoes to the wheels of both trucks at one time.

In the accompanying drawings, which illustrate the present invention and which form a part of this specification, Figure 1 is a plan view of a truck embodying myimprovements. Fig. 2 is a side elevation, partly in section; and Fig. 3 is a cross-section on the line 3 3 of Fig, l.

The same numerals of reference refer to the same parts in all the views.

Referring to the drawings, 4 4 indicate the pedestals, which are connected together by the upper duplex beams 5 and the lowerbeams,

6, (both sides of the truck-frame being in all 75.

boxes 7 to spring-cushion the truck-frame at that point, and on the tops of the journalboxes 7 are seated the spiral springs 8, which extend between the members of beam 5 and bear against the top members of the pedestals 7", thus spring-cushioning the truck-frame at that point. The duplex beams 5 are riveted in channels formed in the sides of the top members of the pedestals 4 and extend beyond the pedestals, such extensions being supported by the under truss-beams 9, riveted to beams 5'and to the bottoms of pedestals 4. To the outside of pedestals 4 are riveted the duplex end beams 10, supported from below by the truss-beams 9, which are riveted to the bottoms of pedestals 4 and to said beams 10.

At the bottom of the pedestals 4 are secured the removable repairing-pieces 11.

The duplex beams 5 and 10 are carried around at the ends of the truck and extend transversely of the truck, withtheir members I00 5 and 10, respectively, in contact, and serve to strengthen the structure at those points,

and to each end of the truck there is riveted an angle-beam 12. By forming the duplex beams 5 of continuous pieces extending from pedestals 4 beyond the pedestals at the pilotwheels, to which latter pedestals said beams are independently riveted, and continuing said beams transversely at the end of the truck without break there is afforded superior strength to the structure.

The side frames of the truck are connected together centrally by the transverse tie-beam 13 of a depth corresponding to the space between beams 5 and 6 and is riveted to said beams, thus serving to hold the side frames in proper alinement.

The driving-wheels are indicated at 14 and their axle at 14 and the pilot-wheels at 15 and their axle at 15*.

The bolster 16, which is elastically supported, is provided with the usual swivel connections to receive the car-body and is swung from links pivoted to transoms supported on the duplex beams 5. The transoms 17 are arranged near the pedestals 4, so as to bring the bolster 16, which is supported thereby, near the axle of the driving-wheels, thus placing a larger percentage of the load on the driving-wheels than on the pilot-wheels. The transoms are riveted to plates 18, which in turn are riveted to the duplex beams 5. The bolster 16 is suspended between the transoms 17, which serve as a guide for it and prevent it from m oviugin a direction longitudinal with the car.

The means for elastically supporting bolster 16 and affording to it a limited swinging movement transverse of the truck comprise the spring-plank 18 having end brackets 18, to'

which are pivoted the lower ends of four links 19, the upper ends of said links being pivoted to the transoms 17, as shown. The links 19 have normally a slight outward inclination, as seen in Fig. 3, the effect of which is to raise that side of the car-body toward which the bolster 16 moves when the truck runs into a curve, thereby giving the effect of an additional superelevation of the outside rail of the curve. The spring-plank is provided with pockets 20, in which seat the spiral springs 21, whose upper ends seat in pockets 22, secured to the bottom of the bolster 16. Between the spiral springs 21, one near each end of the spring-plank,.there is arranged a halfelliptic spring 23, whose ends rest in sockets 23 on the spring-plank, the said spring 23 being connected to the bot-tom of the bolster 16 by a suitable elliptic-spring socket 23 The motor for propelling the truck is indicated at 24, and it is sleeved on the axle 14 of the driving-wheels in any approved manner, with its opposite end supported by the bar 25, which rests on spiral springs 26, suitably arranged in brackets 27, which are riveted to the transverse duplex beams 10 at that end of the truck. The weight of the motor augments the traction 011 the driving wheels.

At that end of the truck outside the pilotwheels there is secured to the angle-bar 12 the plane track 28, preferably in the form of a sector of a circle whose center is the swivel connection 16 between the truck and the carbody, its central portion being on the longitudinal axis of the truck.

To the car-sill, which is indicated at 29, is fixed a bolt 30, screw-threaded below its point of attachment to the car-sill and provided with a pocket 31 and a nut 32 on said screw-threaded portion, which nut may be screwed up or down to increase or decrease the tension of spiral spring 33, which at its bottom seats in a pocket 34, resting on the housing 35, whose upper extension is surrounded by the spiral spring 33 and in whose lower extension is journaled the roller 36, which is adapted to travel on the track 28 as the truck swivels under the car when running through a curve. By turning the nut 32 the tension on spring 33 may be'increased or decreased as desired, so as to increase or decrease the pressure of the roller 36 on its track 28. By this means the desired amount of weight is secured on the pilotwheels and the traction on the driving-wheels regulated as required.

It will be evident that if the car-body is mounted on a pair of trucks constructed, as described, with the pilot-wheels of the trucks turned outwardthat is, at the ends of the car-on entering a curve the roller 36 will be carried from the center of the pilot-axle toward that pilot-wheel of each truck which is in contact with the outside rail of the curve. This action will so divide the weight transferred from the car-body to the pilot-wheels through the roller 36 that the particular pilot-wheel in contact with the outside rail of each truck will receive more weight than when the car is running on a straight track.

It is well known that under normal conditions the flange of the leading outside wheel in a four-wheeled truck is the one which is pressed hard against the rail, and it is consequently this wheel which has a tendency to leave the track. Now with a pair of truckssuch as herein described arranged under a car with the pilot-wheels outward the leading outside wheel of the rear truck will be one of the drivers, and hence has ample pressure upon it to prevent its leaving the rail. The leading outside wheel of the forward truck will be that pilot-wheel toward which the roller 36 moves and which receives from such movement an additional proportion of the whole weight transferred to the pilot-axle by said roller 36. This additional weight prevents the pilot-wheel of the leading truck from leaving the track. The advantage of this mode of increasing the weight on the pilot-wheel which is in danger of leaving the rail when rounding a curve is twofold. First, no Weight is deducted from that carried by the drivers, as it is byall other constructions. Secondly, as the track 28 is plane and the roller 36 cylindrical there is no resistance to the movement of the roller on the track except that due to friction, whereas all camplates or similar devices depend on increasing the tensionon the spring in the combination and consequently'oppose a resistance to the swiveling of the truck greater than that due to friction alone. Such increased resistanceincreases the pressure of the leading outside flange against the rail and renders that wheel more apt to leave the track.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isa 1. In a car-truck the combination of front and rear wheels, pedestals, side beams connectin g the pedestals on each side of thetruck, duplex end beams secured to opposite faces of the pedestals and projecting therefromseparated by approximately the thickness of the pedestal, said end beams being connected across the truck by a duplex cross-beam the members of which are integral with said end beams and are in contact with each other across the truck.

2. In a car-truck, the combination of driving-wheels and pilot-wheels, front and rear pedestals, upper duplex side beams and lower side beams connecting the pedestals together,

' separated duplex end beams riveted to opposite faces of the pedestals at the drivingwheels, and connected across the truck by members integral with the end beams, said members being in contact across the end of the truck, under truss-beams under the end beams, and motor-supporting appliances on the end of the truck equipped with the driving-wheels and connected to the duplex beam across the truck.

3. In a car-truck driving-wheels and with a pair of pilot-wheels of less diameter than the drivingwheels, the combination with the pedestals, of duplex upper side beams and lower side beams connecting the pedestals together, duplex end beams riveted to the pedestals at the drivingwheels and connected together at their ends transversely, under truss-beams at each end of the truck, and motor-supporting appliances arranged on that. end of the truck equipped with the driving-wheels.

4. In a car-truck provided with a pair of drivingwheels and with apair of pilot-wheels of less diameter than the driving-wheels, the combination with the pedestals, duplex upper side beams riveted to'the pedestals at the driv- 55 ing-wheels and extending beyond the pedestals at the pilot-wheels, to which pedestals they are suitably riveted, and extending around at their ends transversely of the truck With their duplex members in contact with each other, and duplex end beams riveted to the pedestals at the driving-wheels and connected together transversely at their ends, of lower side beams connecting the pedestals together at their bottoms, and under trussbeams at each end of the truck.-

5. In a car-truck driving-wheels and with a pair of pilot-wheels provided with a pair of provided with apair of of less diameter than the driving-Wheels, the combination with the pedestals, of duplex upper side beams riveted to the pedestals at the driving-wheels and extending beyond the pedestals at the pilot-Wheels, to which they are suitably riveted, lower side beams connecting the pedestals together at their bottoms, duplex end beams riveted to the pedestals at the driving-wheels, under truss-beams at each end of the truck,transverse end beams connecting the side frames together and a centrally-arranged. transverse tie-beam of a depth corresponding to the space between the upper and lower side beams and suitably riveted to said beams.

6. In a car-truck provided with a pair of driving-wheels and with a pair of pilot-wheels of less diameter than the driving-wheels, the combination with the side frames comprising pedestals, upper and lower side beams connecting the pedestals together and under truss-beams at the ends of the side frames, of a pair of transoms supported on the upper side frames between the center of the truck and the axle of the. driving-wheels, a bolster elastically supported between said transoms and appliances sustaining the support for the bolster and permitting the latter to swing transversely of the truck.

7. In a car-truck provided with a pair of driving-wheels and with a pair of pilot-wheels of less diameter than the driving-Wheels, the combination with the pedestals, upper side beams riveted to the pedestals at the drivingwheels and extending beyond the pedestals at the pilot-wheels to which they are suitably riveted, end beams riveted to the pedestals at the driving wheels, suitable transverse beams connecting the side frames together, lower side beamsconnecting the pedestals together at theirbottoms and under truss-beams at the endsof the truck, of a pair of transoms supported on the upper side beams between the center of the truck and the axle of the drivingwheels, a bolster elasticallysupported between said transoms and appliances sustaining the support for the bolster and per mitting the latter to swing transversely of the truck.

8. In a car-truck provided with a pair of driving-wheels and with a pair of pilot-wheels of less diameter than the drivingwheels, the

combination with the pedestals, upper side.

beams riveted to the pedestals, lower side beams connecting the pedestals together at their bottoms,suitable transverse beams connecting the side frames together and under truss-beams at the ends of the truck-frame, of a pair of transoms supported on the upper side frames between the center of thetruck and the axle of the driving-wheels, a springplank hinged to the transoms to permit it to swing transversely of the truck and a bolster supported on said spring-plank by a series of springs and operating between said transoms.

9. In a car-truck provided with a pair of driving-wheels and with a pair of pilot-wheels of. less diameter than the driving-w11ee1s,the combination with the side frames comprising pedestals, upper and lower beams connecting the pedestals together, end beams riveted to the pedestals at the driving-wheels, transverse beams connecting the side frames together at their ends and under truss-beams at the ends of the side frames, of a bolster elastically supported on the side frames near the driving wheels and an electric motor sleeved to the axle of the driving-wheels with its opposite side suitably supported on the transverse beam at the end of the truck carrying the driving-wheels.

10. Ina car-truck provided with a pair of driving-wheels and with a pair of pilot-Wheels of less diameter than the driving-wheels, the combination with the side frames connected together by transverse end beams, a bolster supported on the side frames near the driving-wheels, an electric motor sleeved to the axle of the driving-wheels with its opposite side supported on the transverse beam at the end of the truck carrying the driving-wheels, and means for adjusting the weight of the car-body on the pilot-wheels, the said means attached to the truck-frame outside the pilotwheels and to the bottom of the car-body contiguous thereto.

11. In a car-truck provided with a pair of driving-wheels and with a pair of pilot-wheels of less diameter than the driving-wheels, the combination with the side frames connected together by transverse end beams, a bolster supported on the side frames near the driving-wheels, and an electric motor sleeved to the axle of the driving-wheels with its opposite side suitably supported on the transverse beam at the end of the truck carrying the driving-wheels, of a suitable track on the transverse end beam outside the pilot-wheels, a roller adapted to travel on said track and connected with the bottom of the car-body at its end and a spring arranged between the roller and car-body, for the purpose set forth.

12. In a car-truck provided with a pair of driving-Wheels and with a pair of pilot-wheels of less diameter than the driving-wheels, the combination with the side frames connected together by transverse end beams, a bolster elastically supported on the side frames near the driving-wheels, and an electric motor sleeved to the axle of the driving-wheels with its opposite side elastically supported on the transverse beam at the end of the truck carrying the driving-wheels, of a suitable track on the transverse end beam outside the pilotwheels, a roller connected to the bottom of the car-body at its end and a spring arranged between the roller and the car-body, for the purpose set forth.

13. In a car-truck provided with a pair of driving-wheels and with a pair of pilot-wheels of less diameter than the driving-wheels, the

combination with the side frames connected provided with swivel-plate connections for the car-body and elastically supported on the side frames near the driving-wheels, and an electric motor sleeved to the axle of the driving-wheels with its opposite side supported on the transverse beam at the end of the truck carrying the'driving-wheels, of a track in the form of a sector of a circle whose center is the swivel connection between the truck and. carbody, the said track located on the transverse end beam outside the pilot-wheels, a roller connected with the bottom of the car-body and adapted to travel on said track and a spring arranged between the roller and the car-body, for the purpose set forth.

14. In a car-truck provided with a pair of driving-wheels and with a pair of pilot-wheels of less diameter than the driving-wheels, the combination with the side frames connected together by transverse end beams, a bolster supported on the side frames near the driving-wheels, an electric motor sleeved to the axle of the driving-wheels, brackets, as 27, riveted to the transverse end beams 10, spiral springs supported by said brackets and a bar, as 25, supported on said spiral springand sustaining or supporting the free end of the motor, of means for adjusting the weight of the car-body on the pilot-wheels, the said means secured partly to the truck and partly to the car-body outside of the pilot-wheels, substantially as set forth. 7

15. In a car-truck, the combination with the side frames and transverse end beams connecting the side frames together, of a bolster supported by the side frames near the driving-wheels, an electric motor sleeved on the driving-axle with its opposite end supported -by appliances secured to the transverse beam at the end of the truck carrying the drivingwheels, a track located on the transverse beam at the end of the truck carrying the pilotwheels, a bolt secured to the bottom of the car-body, screw-threaded near its point of attachment to the car-body and provided with a pocket, as 31, and aunt, as 32, aroller adapted to cooperate with aforesaid track and j ournaled in a housing through which said bolt is adapted to operate and a spiral spring surrounding said housing between collar 31 and a collar near the bottom of the housing, substantially as set forth.

16. In a car-truck provided with a pair of driving-wheels and with a pair of pilot-wheels of less diameter than the driving-wheels, the combination with the side frames, of an electric motor sleeved to the axle of the drivingwheels with its opposite side suitably supported on the end of the truck-frame outside of the driving-wheels, a pair of transoms supported on the side frames near the driving-wheels, a spring-plank suspended from said transoms on two pairs of links and equipped with a system of springs, and a bolster supported on said springs, substantially as set forth.

17. In a car-truck provided with a pair of driving-wheels and with a pair. of pilot-wheels of less diameter than the driving-wheels, the combination with the side frames, of an electric motor sleeved to the axle of the drivingwheels with its opposite side suitably supported on the end of the truck-frame outside of the driving-wheels, a pair of transoms supported on the side frames near the driving- Wheels, a spring-plank, pairs of links sus-, pending said spring-plank from the transoms and having normally a slight outward inclination, a pair of spiral springs and an-intermediate elliptic spring supported on said springplank, and a bolster operating between the said transoms and connected to and supported by said system of springs.

18. In a car-truck provided with a pair of driving-wheels and With a pair of pilot-wheels of less diameter than the driving-Wheels, the

verse beam outside the pilot-wheels, a roller 2 5 suitably connected to the bottom of the carbody and adapted to travel on said track and a spring arranged between the roller and the car-body, for the purpose set forth.

Signed at New York,in the county and State of New York, this 4th day of August, 1897.

CHARLES F. UEBELAOKER.

Witnesses:

J. E. M. BOWEN, O. HOLLOWAY. 

